Buggy code:
public class Circuit implements Printable { private String name = null ; private String dir = "" ; private Set < Element > elements = new HashSet < Element > ( ) ; private SubCircuit subElement = null ; private Editor editor = null ; private Set < String > namesUsed = new HashSet < String > ( ) ; private SortedMap < String , JumpStart > starts = new TreeMap < String , JumpStart > ( ) ; private boolean changed = false ; private Set < Element > loadedElements = new HashSet < Element > ( ) ; private Map < Integer , Element > elementMap = new HashMap < Integer , Element > ( ) ; private static int lineNumber ; public Circuit ( String name ) { } public String getDirectory ( ) { } public void setDirectory ( String dir ) { } public String getName ( ) { } public void setName ( String name ) { } public boolean hasChanged ( ) { } public void markChanged ( ) { } public void clear ( ) { } public void addElement ( Element el ) { } public void remove ( Element el ) { } public Set < Element > getElements ( ) { } public boolean load ( Scanner input ) { } private boolean load ( Scanner input , int ln ) { try { if ( ! ( input . hasNext ( ) ) ) { JLSInfo . loadError = "no<seq2seq4repair_space>header<seq2seq4repair_space>info" ; return false ; } String str = input . next ( ) ; if ( ! ( str . equals ( "CIRCUIT" ) ) ) { JLSInfo . loadError = "file<seq2seq4repair_space>does<seq2seq4repair_space>not<seq2seq4repair_space>start<seq2seq4repair_space>with<seq2seq4repair_space>CIRCUIT" ; return false ; } if ( ! ( input . hasNext ( ) ) ) { JLSInfo . loadError = "no<seq2seq4repair_space>name<seq2seq4repair_space>for<seq2seq4repair_space>CIRCUIT" ; return false ; } if ( name . equals ( "" ) ) name = input . next ( ) ; else input . next ( ) ; Circuit . lineNumber += 1 ; while ( input . hasNext ( ) ) { str = input . next ( ) ; if ( str . equals ( "ENDCIRCUIT" ) ) { Circuit . lineNumber += 1 ; return true ; } if ( ! ( str . equals ( "ELEMENT" ) ) ) { JLSInfo . loadError = "expecting<seq2seq4repair_space>ELEMENT" ; return false ; } if ( ! ( input . hasNext ( ) ) ) { JLSInfo . loadError = "expecting<seq2seq4repair_space>ELEMENT<seq2seq4repair_space>type" ; return false ; } String elementType = input . next ( ) ; Object obj = null ; try { Class < ? > c = Class . forName ( ( "jls.elem." + elementType ) ) ; Constructor < ? > [ ] cn = c . getConstructors ( ) ; obj = cn [ 0 ] . newInstance ( this ) ; } catch ( ClassNotFoundException ex ) { return false ; } catch ( InstantiationException ex ) { return false ; } catch ( IllegalAccessException ex ) { JLSInfo . loadError = "illegal<seq2seq4repair_space>access<seq2seq4repair_space>exception" ; return false ; } catch ( InvocationTargetException ex ) { JLSInfo . loadError = "invocation<seq2seq4repair_space>target<seq2seq4repair_space>exception" ; return false ; } if ( ! ( obj instanceof Element ) ) { JLSInfo . loadError = "non-Element<seq2seq4repair_space>subclass" ; return false ; } Element newElement = ( ( Element ) ( obj ) ) ; Circuit . lineNumber += 1 ; boolean loadOK = loadElement ( newElement , input ) ; if ( loadOK ) { loadedElements . add ( newElement ) ; } else { <START_BUG> JLSInfo . loadError = "false<seq2seq4repair_space>from<seq2seq4repair_space>loadElement" ; <END_BUG> return false ; } } JLSInfo . loadError = "no<seq2seq4repair_space>trailer" ; return false ; } catch ( Exception ex ) { JLSInfo . loadError = "load<seq2seq4repair_space>exception:<seq2seq4repair_space>" + ( ex . getMessage ( ) ) ; for ( int i = 0 ; i < ( ex . getStackTrace ( ) . length ) ; i += 1 ) { JLSInfo . loadError += ( "\n" + ( ex . getStackTrace ( ) [ i ] . getFileName ( ) ) ) + ( ex . getStackTrace ( ) [ i ] . getLineNumber ( ) ) ; } return false ; } catch ( Error er ) { JLSInfo . loadError = "load<seq2seq4repair_space>error:<seq2seq4repair_space>" + ( er . getMessage ( ) ) ; return false ; } } public boolean loadElement ( Element el , Scanner input ) { } public boolean finishLoad ( Graphics g ) throws Exception { } public Rectangle getBounds ( ) { } public void save ( PrintWriter output ) { } public void draw ( Graphics g , Set < Element > second , SimpleEditor ed ) throws Exception { } public int print ( Graphics g , PageFormat format , int pagenum ) { } public void addToBook ( Book book , PageFormat format ) { } public void exportImage ( String file ) throws Exception { } public void untouchPuts ( ) { } public Element getElementByID ( int id ) { } public boolean addName ( String name ) { } public boolean hasName ( String name ) { } public void removeName ( String name ) { } public void setImported ( SubCircuit sub ) { } public boolean isImported ( ) { } public SubCircuit getSubElement ( ) { } public void removeAllProbes ( ) { } public void clearAllWatches ( ) { } public void resetAllDelays ( ) { } public boolean addJumpStart ( String name , JumpStart start ) { } public JumpStart getJumpStart ( String name ) { } public Set < String > getJumpStartNames ( ) { } public void removeJumpStart ( String name ) { } public void setEditor ( Editor ed ) { } public Editor getEditor ( ) { } public int getLineNumber ( ) { } public String toString ( ) { } public boolean load ( LinkedList < String > read ) { }

Fix:
JLSInfo . loadError += ";<seq2seq4repair_space>false<seq2seq4repair_space>from<seq2seq4repair_space>loadElement" ;